Biogas Production: Pretreatment Methods in Anaerobic Digestion

Ackmez Mudhoo , BEng, MPhil, is Lecturer in the Department of Chemical and Environmental Engineering at the University of Mauritius. His main research interests encompass bioremediation of organic wastes and other process residues using composting, anaerobic digestion, and other green tehniques. He has dozens of international journal publications and conference papers to his credit. He is also a peer reviewer on numerous journals, and is the editor for two international research journals.

Preface xv Acknowledgements xvii Special Contributor xviii Editor xix List of Contributors xxi 1. Anaerobic Digestion: Pretreatments of Substrates 1 Tanta Forster-Carnetro, Ricardo Isaac, Montserrat Perez, and Ciarita Schvartz 1.1 Pretreatments in Anaerobic Digestion Process 2 1.2 Physical Pretreatment 6 1.3 Chemical Pretreatment 15 1.4 Biological Pretreatment 17 1.5 Combined Pretreatment 18 1.6 Concluding Note 19 2. Recalcitrance of Lignocellulosic Biomass to Anaerobic Digestion 27 Mohammad J. Taherzadeh and Azam Jeihanipour 2.1 Introduction 27 2.2 Plant Cell Wall Anatomy 28 2.3 Chemistry of Cell Wall Polymers 30 2.4 Molecular Interactions Between Cell Wall Polymers 39 2.5 Plant Cell Wall Molecular Architecture 40 2.6 Recalcitrance of Plant Cell Wall Cellulose 42 2.7 Reduction of Biomass Recalcitrance 46 2.8 Concluding Note 50 3. The Effect of Physical, Chemical, and Biological Pretreatments of Biomass on its Anaerobic Digestibility and Biogas Production 55 Katerina Stamatelatou, Georgia Antonopoulou, loanna Ntaikou, and Gerasimos Lyberatos 3.1 Introduction 56 3.2 Pretreatment Methods for Lignocellulosic Biomass 57 3.3 Pretreatment Methods for Sewage Sludge 77 3.4 Concluding Note 84 4. Application of Ultrasound Pretreatment for Sludge Digestion 91 Show Kuan Yeow and Wong Lai Peng 4.1 Introduction 91 4.2 Anaerobic Digestion 93 4.3 Overview of Pretreatment Methods for Anaerobic Digestion 95 4.4 Fundamental of Ultrasound 100 4.5 Bubbles Dynamic 103 4.6 Effects of Ultrasound 106 4.7 Ultrasound Applications 109 4.8 Ultrasonication for Anaerobic Digesion 116 4.9 Evaluation on Sludge Disintegration 126 4.10 Conclusions 131 5. Microwave Sludge Irradiation 137 Cigdetn Esktctoglu and Giampiero Galvagno 5.1 Introduction 137 5.2 Microwave Theory 139 5.3 Microwave Irradiation for Waste Sludge Treatment 144 5.4 Industrial Microwave Applications 147 5.5 Microwave Absorbing Materials and Ionic Liquids 148 5.6 Sludge Pretreatment Similar to Microwave Irradiation 151 5.7 Concluding Notes 151 6. Hydrolytic Enzymes Enhancing Anaerobic Digestion 157 Teresa Suarez Quinones, Matthias Plochl, Katrin Pazolt, Jorn Budde, Robert Kausmann, Edith Nettmann, and Monika Heiermann 6.1 Introduction 158 6.2 Where and How can Enzymes be Applied? 170 6.3 Impact of Enzyme Application 178 6.4 Economic Assessment 191 6.5 Concluding Note 192 7. Oxidizing Agents and Organic Solvents as Pretreatment for Anaerobic Digestion 199 Lise Appels, Jan Van Impe, and Raf Dewil 7.1 Oxidative Pretreatment Methods 199 7.2 Organic Solvents 210 7.3 Concluding Note 212 8. Anaerobic Digestion and Biogas Utilization in Greece: Current Status and Perspectives 215 Avraam Karagiannidis, George Perkoultdts, and Apostolos Malamakts 8.1 Assessment of Existing Biogas Installations 215 8.2 Use of Waste Material for Biogas Production 217 8.3 Feedstock Availability and Agricultural Structures 219 8.4 Purification of Biogas for Insertion in the Natural Gas Grid 224 8.5 Biogas Utilization 226 8.6 Concluding Note 227 9. Original Research: Investigating the Potential of Using Biogas in Cooking Stove in Rodrigues 229 Dinesh Surroop and Osman Dina Begue 9.1 Energy Crisis and Future Challenges 230 9.2 Case Study of Rodrigues 231 9.3 Rationale of Research Study 233 9.4 Research Methodology 234 9.5 Reactor Design Considerations 241 9.6 Results, Findings and Discussions 247 9.7 Conclusions 257 10. Optimizing and Modeling the Anaerobic Digestion of Lignocellulosic Wastes by Rumen Cultures 259 Zhen-Hu Hu and Han-Qing Yu 10.1 Introduction 260 10.2 Materials and Methods 262 10.3 Optimizing the Anaerobic Digestion of Microwave-Pretreated Cattail by Rumen Cultures 266 10.4 Modeling the Anaerobic Digestion of Cattail by Rumen Cultures 275 10.5 Concluding Note 287 11. Pretreatment of Biocatalyst as Viable Option for Sustained Production of Biohydrogen from Wastewater Treatment 291 S. Venkata Mohan and R. Kannatah Goud 11.1 Introduction 292 11.2 Pretreatment of Biocatalyst 294 11.3 Combined Pretreatment 300 11.4 Influence of Pretreatment on Wastewater Treatment 302 11.5 Microbial Diversity 303 11.6 Summary and Future Scope 304 Acknowledgements 305 References 305 Index 313